How did the downhole monitoring system develop?

The first generation of underground monitoring includes a traditional analog CCTV monitoring system that relies on special equipment such as a cable camera video recorder monitor.

Limited scalability systems are generally constrained by the input capacity of video splitters, matrices, and switchers. The camera outputs video signals through a dedicated coaxial cable. Cables connected to dedicated analog video equipment for analog monitoring are limited by analog video cable transmission length and cable amplifier constraints to support local monitoring only. Low video quality is the primary constraint. Video quality decreases as the number of copies increases.

Users with heavy video load must remove or replace the videotape from the VCR for storage, and the videotape is easy to be stolen or inadvertently erased or lost. The second-generation underground monitoring analog-digital monitoring system still uses coaxial cable to output video signals from the camera to the DVR. The digital hard disk video recorder DVR is the middle semi-analog-semi-digital scheme, which can support limited IP network access through DVR and also support video and playback. DVR products do not have a variety of standards, so this generation of systems is a closed system, and there are still many constraints in the DVR system. Limited Scalability The typical constraint of DVRs is that they can only expand up to 16 cameras at a time. Complex cabling analog-to-digital plans still require the installation of separate video cables on each camera, resulting in cabling complexity.

Limited manageability You need external servers and management software to handle multiple DVRs or monitoring points. Limited remote monitoring/controlling capabilities You cannot access any camera from any client. Analog-digital video recordings are prone to lose without maintenance. The third generation of video surveillance is about to complete the IP video surveillance system. IPVS is an all-IP video surveillance system that is significantly different from the previous two plans.

The advantage of this system is that the camera has a built-in web server and directly supplies the Ethernet port. These cameras generate JPEG or MPEG4 data files that can be accessed, monitored, recorded, and printed by any authorized client from anywhere in the network instead of generating continuous analog video signals to draw an all-IP video surveillance system. Its great advantages lie in simplicity, consolidating redundancy Spare memory, powerful central control, specific remote monitoring, and tape backup storage technology permanently protect the monitoring picture from hard drive failures.